content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.flowable.internal.operators;
  
  import java.util.NoSuchElementException;
  
  import org.reactivestreams.*;
  
  import hu.akarnokd.reactivestreams.extensions.RelaxedSubscriber;
  import io.reactivex.flowable.Flowable;
  import io.reactivex.flowable.internal.subscriptions.*;
  
  public final class FlowableLast<T> extends AbstractFlowableWithUpstream<T, T> {
  
      final T defaultItem;
  
      final boolean errorOnEmpty;
  
      public FlowableLast(Flowable<T> source, T defaultItem, boolean errorOnEmpty) {
          super(source);
          this.defaultItem = defaultItem;
          this.errorOnEmpty = errorOnEmpty;
      }
  
      @Override
      protected void subscribeActual(Subscriber<? super T> s) {
          source.subscribe(new LastSubscriber<T>(s, defaultItem, errorOnEmpty));
      }
  
      static final class LastSubscriber<T> extends DeferredScalarSubscription<T>
      implements RelaxedSubscriber<T> {
  
          private static final long serialVersionUID = 5455573518954847071L;
  
          final T defaultItem;
  
          final boolean errorOnEmpty;
  
          Subscription upstream;
  
          LastSubscriber(Subscriber<? super T> actual, T defaultItem, boolean errorOnEmpty) {
              super(actual);
              this.defaultItem = defaultItem;
              this.errorOnEmpty = errorOnEmpty;
          }
  
          @Override
          public void onNext(T t) {
              this.value = t;
          }
  
          @Override
          public void onError(Throwable t) {
              value = null;
              actual.onError(t);
          }
  
          @Override
          public void onComplete() {
              T v = value;
              value = null;
              if (v == null) {
                  if (errorOnEmpty) {
                      actual.onError(new NoSuchElementException());
                  } else {
                      actual.onComplete();
                  }
              } else {
                  complete(v);
              }
          }
  
          @Override
          public void onSubscribe(Subscription s) {
              if (SubscriptionHelper.validate(upstream, s)) {
                  upstream = s;
  
                  actual.onSubscribe(this);
  
                  s.request(Long.MAX_VALUE);
              }
          }
  
          @Override
          public void cancel() {
              super.cancel();
              upstream.cancel();
          }
      }
  }
  